REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 16 March 2019

TO ADJUST FOCUS & WHITE BALANCE TO SONY KV-32FQ70U – FD TRINITRON TV

TO ADJUST FOCUS & WHITE BALANCE TO SONY KV-32FQ70U – FD TRINITRON TV


TO ADJUST FOCUS
  • Receive a television broadcast signal.
  • Normalize the picture setting.
  • Adjust the focus control located on the fly back transformer to obtain the best focus at the center of the screen.  Bring only the center area of the screen into focus, the magenta ring appears on the screen. In this case, adjust the focus to optimize the screen uniformly.
G2 Adjustment.
  • Input a dot signal from the pattern generator.
  • Set the Picture, Brightness and Color to minimum.
  • Apply 165V DC from an external power supply to the R, G and B cathodes of the CRT.
  • Whilst watching the picture, adjust the G2 control [SCREEN] located on the fly back transformer to the point just before the fly back return lines disappear.
White balance adjustment for TV mode.
  • Input an all-white signal from the pattern generator.
  • Program the Remote Commander for operation in Service Mode.
  • Enter into the ‘Service Mode’ by pressing ‘VIDEO’ button twice and ‘MENU’ on the Service Commander.
  • Select ‘Service’ from the on screen menu display and press ‘Right Arrow’.
  • The ‘Service’ menu will appear on the screen.
  • Set the ‘Contrast’ to MAX.
  • Set the ‘R-Drive’ to 50.
  • Adjust the ‘G-Drive’ and the ‘B-Drive’ so that the white balance becomes optimum.
  • Press the ‘OK’ button to write the data for each item.
  • Set the ‘Contrast’ to MIN.
  • Set the ‘R-Cutoff’ to 29.
  • Adjust the ‘G-Cutoff’, and the ‘B-Cutoff’ with the left and right buttons on the remote commander so that the white balance becomes optimum.
  • Press the ‘OK’ button to write the data for each item.
Programming the Remote Commander for Operation in Service Mode.
  1. Press the VCR/TV/DVD button until the TV LED lights.
  2. Press and hold the yellow button for approx. 5 seconds until the TV LED flashes quickly.
  3. Press 99999. All three LED’s should light.  The remote commander is now set to Service Mode.
  4. To return the remote commander to normal operation mode repeat steps 1. And 2. Then press 00000. All three LED’s should light.
  5. The remote commander is now set to normal mode.
Setting the TV into Service Mode.
  • Program the remote commander for operation in Service Mode as described above.
  • Turn on the TV main power switch.
  • Press the video standby button on the remote commander twice.  ‘TT ’ will appear in the upper right corner of the screen.  Other status information will also be displayed.
  • Press ‘MENU’ on the remote commander to obtain the following menu on the screen.
  • Move to the corresponding adjustment item using the up or down arrow buttons on the Remote Commander.
  • Press the right arrow button to enter into the required menu item.
  • Press the ‘Menu’ button on the Remote Commander to quit the Service Mode when all adjustments have been completed.
After carrying out the service adjustments, to prevent the customer accessing the ‘Service Menu’ switch the TV set OFF and then ON.
Posted By: FRANK at 03:54
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